What's It All Mean??

[pbmc59]

Hello,
I've been trying now for several weeks to burn D8 movies the way I want to. I have a feeling it's either my new system constraints or me, thats why I'm here asking for your help.
I capture my D8 tapes from my camcorder through the firewire ok. But when I go to burn the DVD I can either only get one D8 tape ( 60 minutes of digital8 ) or the utility says I've exceeded the 4.0G file size, even though, after caturing, the file property size says it's approx. 1.0G.
I capture using Windows Movie Maker, Roxio Videowave and Sonic MyDVD. With WMM I was able to control the quality ( bit rate etc ) a little and get the file down to 1.0G.
This may also have to do with me not understanding what terms mean what. For instance: capturing I understand, but what is Roxio doing to it when it's done capturing? Rendering? Transcoding? Encoding? Is there something more I can do once it's captured, before I try and burn ( the only term I understand so far)?
Sorry for the large append, but I've tried to do this for a while now, researched it here too, but still am having trouble understanding the whole process.
ANY help will be appreciated. Thanks in advance.

[Tommyknocker]

Once you captured the video, did you try to change it to a form your DVD burner can use? E.g., Did you load it into a program like TMPGEnc and have it encode it to DVD format and then have your favorite burner put it on a DVD? You may want to try this way.